If you read the headlines, a triathlon might seem like a death sentence. Titles like "Sudden Death Risk Looms in Triathlons" might catch your eye, especially if you just unwittingly signed up for the big race. Is it safe to compete in a triathlon, or do you risk horrible accidents, heart failure and drowning?

If you've been bitten by the triathlon bug, you're signing up for races left and right! But even if you've got the stamina to reach the finish line, how many triathlons can you safely compete in per season?

Triathlons are becoming more popular by the day. Despite the sport's grueling nature, more than a million people signed up for a traditional triathlon in 2009. But what about triathletes who want something a little different -- or tougher?

Are you a hard-core triathlete who enjoys swimming, cycling and running? Then you've probably heard of the International Triathlon Union (ITU), the world governing body of triathlons and related multi-sports. But what does the ITU entail?

Triathlons are unparalleled endurance tests. Because they're so competitive and physically punishing, the governing bodies of the sport have implemented strict and detailed rules to ensure the enjoyment and safety of everyone involved.

Most of us have heard of the Ironman Triathlon. But that's not the only version of the sport. There are actually several types of triathlons encompassing various distances and even sports beyond swimming, running and biking.